Question
A takes 3 hours more while swimming upstream than
downstream. His speed in still water is 12 km/hr. The speed of stream is 4 km/hr. What is the distance?Solution
Let A’s speed be x km/hr and current speed be y km/hr. Downstream speed = x + y = 12 + 4 = 16 km/hr Upstream speed = x – y = 12 – 4 = 8 km/hr Let time taken for downstream be ‘t’ hours. Here distance is same. => 16 × t = 8 × (t + 3) => t = 3 hrs Distance = 16 × 3 = 48 km
3 15 35 63 99 ?
15Â Â Â Â Â Â Â Â Â Â Â Â 13 Â Â Â Â Â Â Â Â 28 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 24 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 54 Â Â Â Â Â Â Â Â 52
...6Â Â Â Â Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â Â Â Â Â 15Â Â Â Â Â Â Â Â Â Â 46Â Â Â Â Â Â Â Â Â Â 185Â Â Â Â Â Â Â Â ?
...Study the given pattern carefully and select the number that can replace the question mark (?) in it.
4 7 6
15 ? 21
44 68 60
36, 49, 23, 62, ?, 75
6 3.5 2.5 ? 8.5 23.75
...49Â Â Â 84Â Â Â 119Â Â Â 154Â Â Â 189Â Â Â ?
A series is 4, 5, 17, 88, 620, 5585
If another series a, b, 23, d, e, f follows the same pattern as the given number series, then find the approx...
48Â Â Â Â 61 Â Â Â Â 76 Â Â Â Â 94Â Â Â Â 116 Â Â Â Â Â ?
3 12 48 192 768 ?
Relevant for Exams:
